A device and method for detecting dirty and clogged air conditioning filters

Abstract

This invention discloses an air conditioner filter clogging detection device and method. The air conditioner filter clogging detection device includes: a spray module for spraying atomized droplets onto the windward side of the filter; a detection module for detecting the amount of droplets passing through the filter; and a control module for determining whether the filter is clogged based on the amount of droplets detected by the detection module, and issuing a prompt when the filter is clogged. The air conditioner filter clogging detection device and method of this invention, by designing a spray module to spray atomized droplets onto the windward side of the filter, a detection module to detect the amount of droplets passing through the filter, and a control module to determine whether the filter is clogged based on the amount of droplets detected by the detection module, and issuing a prompt when the filter is clogged, reminds the user to clean the filter in time; determining whether the filter is clogged by the amount of droplets passing through the filter is simple, convenient, and has high detection accuracy, solving the technical problem of poor detection accuracy of filter clogging in the prior art.

Description

Technical Field

[0001] This invention belongs to the field of air conditioning technology, specifically, it relates to a device and method for detecting dirt and clogging in air conditioning filters. Background Technology

[0002] Air conditioners are a common device used for air conditioning, and their ability to be used healthily is an important factor affecting the user experience.

[0003] The air conditioner's dust filter is hidden behind the panel, making it difficult for users to observe under normal circumstances. Over time, dust accumulates on the filter, and many users haven't opened the panel to check its cleanliness even after years of use. Dust accumulation on the filter can affect the air conditioner's performance and the user's health.

[0004] Currently, the method for detecting dirt and clogging of air conditioner filters is generally to detect the pressure difference on both sides of the filter. However, the above detection method is easily affected by external factors, has poor detection accuracy, and is prone to misjudgment. Summary of the Invention

[0005] This invention provides an air conditioner filter clogging detection device, which solves the technical problem of poor detection accuracy of filter clogging in the prior art.

[0006] To achieve the above-mentioned technical objectives, the present invention adopts the following technical solution:

[0007] An air conditioner filter clogging detection device includes:

[0008] The spray module is used to spray atomized droplets onto the windward side of the filter screen;

[0009] The detection module is used to detect the amount of droplets passing through the filter screen;

[0010] The control module determines whether the filter is clogged based on the amount of droplets detected by the detection module, and issues a prompt when the filter is found to be clogged.

[0011] In some embodiments of this application, the detection module includes a humidity sensor disposed on the leeward side of the filter; the detection of the amount of droplets passing through the filter specifically includes: the humidity sensor detecting the humidity value;

[0012] The step of determining whether the filter is clogged based on the amount of droplets detected by the detection module specifically includes: determining whether the filter is clogged based on the humidity value detected by the humidity sensor.

[0013] When the humidity value detected by the humidity sensor is less than or equal to the set humidity value, the filter is determined to be clogged.

[0014] If the humidity value detected by the humidity sensor is greater than the set humidity value, it is determined that the filter is not clogged.

[0015] In some embodiments of this application, the detection module includes multiple humidity sensors disposed on the leeward side of the filter; the detection of the amount of droplets passing through the filter specifically includes: the multiple humidity sensors detecting humidity values ​​respectively;

[0016] The step of determining whether the filter is clogged based on the amount of liquid detected by the detection module specifically includes: determining whether the filter is clogged based on the humidity values ​​detected by multiple humidity sensors.

[0017] When a humidity sensor detects a humidity value less than or equal to the set humidity value, exceeding the set percentage, the filter is determined to be clogged.

[0018] When the humidity value detected by the humidity sensor is less than or equal to the set humidity value and does not exceed the set ratio, it is determined that the filter is not clogged.

[0019] In some embodiments of this application, the plurality of humidity sensors are arranged in a matrix.

[0020] In some embodiments of this application, the plurality of humidity sensors are directly mounted on the filter screen;

[0021] Alternatively, the detection module may further include a fixed frame, in which the plurality of humidity sensors are installed, and the fixed frame is detachably connected to the frame of the filter.

[0022] In some embodiments of this application, multiple spray modules are provided, and the multiple spray modules are arranged in an array.

[0023] In some embodiments of this application, the filter is installed at the return air vent of the indoor unit of the air conditioner;

[0024] The detection module is installed on the leeward side of the filter screen;

[0025] The injection module is installed on the back of the panel of the indoor unit of the air conditioner, facing the windward side of the filter.

[0026] A method for detecting dirt and clogging in an air conditioning filter includes:

[0027] Spray atomized droplets onto the windward side of the filter screen;

[0028] The filter is judged to be clogged based on the amount of liquid droplets passing through it, and a prompt is issued when cloggedness is detected. In some embodiments of this application, the judgment of whether the filter is clogged based on the amount of liquid droplets passing through it specifically includes:

[0029] Humidity values ​​are detected using a humidity sensor located on the leeward side of the filter.

[0030] The filter is determined to be dirty or clogged based on the humidity value detected by the humidity sensor.

[0031] When the humidity value detected by the humidity sensor is less than or equal to the set humidity value, the filter is determined to be clogged.

[0032] If the humidity value detected by the humidity sensor is greater than the set humidity value, it is determined that the filter is not clogged.

[0033] In some embodiments of this application, determining whether the filter screen is clogged based on the amount of droplets passing through it specifically includes:

[0034] Humidity values ​​are detected by multiple humidity sensors located on the leeward side of the filter.

[0035] Determine if there are humidity values ​​detected by humidity sensors that are less than or equal to the set humidity value, exceeding the set percentage;

[0036] If so, the filter is determined to be clogged.

[0037] If not, then the filter is determined to be unclogging.

[0038] Compared with the prior art, the advantages and positive effects of the present invention are as follows: The air conditioning filter clogging detection device and method of the present invention are designed with a spray module for spraying atomized droplets onto the windward side of the filter, a detection module for detecting the amount of droplets passing through the filter, and a control module for determining whether the filter is clogged based on the amount of droplets detected by the detection module. When the filter is clogged, a prompt is issued to remind the user to clean the filter in time. Therefore, the air conditioning filter clogging detection device and method of the present invention, which determines whether the filter is clogged by the amount of droplets passing through the filter, is simple and convenient, has high detection accuracy, and solves the technical problem of poor detection accuracy of filter clogging in the prior art.

[0039] Other features and advantages of the present invention will become clearer after reading the detailed description of the embodiments of the present invention in conjunction with the accompanying drawings. Attached Figure Description

[0040] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0041] Figure 1 This is a schematic diagram of an embodiment of the air conditioner filter clogging detection device proposed in this invention;

[0042] Figure 2 yes Figure 1 A schematic diagram showing the fixed frame installed on the filter screen frame;

[0043] Figure 3This is a flowchart of an embodiment of the air conditioner filter clogging detection method proposed in this invention;

[0044] Figure 4 This is a flowchart of another embodiment of the air conditioner filter clogging detection method proposed in this invention;

[0045] Figure 5 This is a flowchart of another embodiment of the air conditioner filter clogging detection method proposed in this invention;

[0046] Figure 6 This is a flowchart of another embodiment of the air conditioner filter clogging detection method proposed in this invention.

[0047] Figure label:

[0048] 10. Panel;

[0049] 20. Injection module;

[0050] 30. Filter screen; 31. Frame;

[0051] 40. Detection module; 41. Fixed frame; 42. Humidity sensor. Detailed Implementation

[0052] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0053] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0054] In the description of this application, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "multiple" means two or more.

[0055] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0056] Example 1

[0057] The air conditioning filter clogging detection device of this embodiment includes a spray module 20, a detection module 40, a control module, etc., see [link / reference]. Figure 1 , Figure 2 As shown.

[0058] The spray module is used to spray atomized droplets onto the windward side of the filter 30.

[0059] The detection module is used to detect the amount of droplets passing through the filter screen 30 and send the detected amount of droplets to the control module.

[0060] The control module determines whether the filter screen 30 is clogged based on the amount of droplets detected by the detection module, and issues a prompt when the filter screen is found to be clogged.

[0061] When the control module determines that the filter is clogged, it sends a prompt signal to the prompt module, such as an indicator light on the air conditioner, a voice prompt module, or a buzzer, to promptly remind the user to clean the filter.

[0062] When the filter is relatively clean and free of dust, atomized droplets sprayed towards the windward side of the filter can penetrate the filter more easily, resulting in a larger number of droplets reaching the leeward side of the filter. Therefore, when the filter is not clogged, a larger number of droplets will penetrate the filter.

[0063] When the filter screen is clogged with dust, the dust acts as a barrier, preventing atomized droplets from penetrating the screen from reaching the windward side. Consequently, fewer droplets reach the leeward side of the filter. Therefore, when the filter screen is clogged, the amount of droplets that penetrate it is relatively small.

[0064] Therefore, the amount of liquid droplets passing through the filter screen can be used to determine whether the filter screen is clogged.

[0065] When the amount of droplets passing through the filter screen is less than or equal to the set amount of droplets, the filter screen is determined to be clogged.

[0066] If the amount of droplets passing through the filter screen is greater than the set amount of droplets, it is determined that the filter screen is not clogged.

[0067] The air conditioning filter clogging detection device of this embodiment uses a spray module to spray atomized droplets onto the windward side of the filter, a detection module to detect the amount of droplets passing through the filter, and a control module to determine whether the filter is clogged based on the amount of droplets detected by the detection module. When clogging is detected, a prompt is issued to remind the user to clean the filter promptly. Therefore, the air conditioning filter clogging detection device of this embodiment, which determines whether the filter is clogged by the amount of droplets passing through the filter, is simple, convenient, and highly accurate, solving the technical problem of poor accuracy in filter clogging detection in existing technologies.

[0068] The air conditioning filter clogging detection device in this embodiment automatically detects whether the filter is clogged and issues a prompt when it is determined to be clogged, reminding the user to clean it in time, which is beneficial to air cleanliness and ensures the user's health.

[0069] In some embodiments of this application, the detection module includes a humidity sensor 42 disposed on the leeward side of the filter, the humidity sensor 42 being used to detect humidity values.

[0070] The detection of the amount of droplets passing through the filter screen specifically includes: humidity sensor detecting humidity value.

[0071] The more droplets pass through the filter, the higher the humidity value detected by the humidity sensor. The humidity value detected by the humidity sensor is directly proportional to the amount of droplets passing through the filter.

[0072] The detection module determines whether the filter is clogged based on the amount of droplets detected, specifically by using the humidity sensor to determine the humidity level.

[0073] When the humidity value detected by the humidity sensor is less than or equal to the set humidity value, it indicates that the amount of droplets passing through the filter screen is less than or equal to the set amount of droplets, and the filter screen is determined to be clogged.

[0074] When the humidity value detected by the humidity sensor is greater than the set humidity value, it means that the amount of droplets passing through the filter is greater than the set amount of droplets, and it is determined that the filter is not clogged.

[0075] The amount of atomized droplets that pass through the filter and reach the humidity sensor, i.e. the humidity value detected by the humidity sensor, determines whether the filter is clogged.

[0076] The amount of liquid droplets passing through the filter can be determined by the humidity value detected by the humidity sensor, which can help determine whether the filter is dirty or clogged. It is simple, convenient, and highly accurate.

[0077] In some embodiments of this application, the humidity sensor is a capacitive humidity sensor. A capacitive humidity sensor converts humidity into a change in capacitance and outputs an electrical signal to the control module. The control module can then determine the humidity value based on the received electrical signal.

[0078] In some embodiments of this application, in order to further improve the accuracy of humidity detection on the leeward side of the filter, the detection module includes multiple humidity sensors disposed on the leeward side of the filter.

[0079] The detection of the amount of droplets passing through the filter screen specifically includes: multiple humidity sensors detecting humidity values ​​respectively.

[0080] The system determines whether the filter is clogged based on the amount of liquid detected by the detection module. Specifically, it determines whether the filter is clogged based on the humidity values ​​detected by multiple humidity sensors.

[0081] When a humidity sensor detects a humidity value less than or equal to the set humidity value, it indicates that the amount of droplets passing through the filter is less than or equal to the set amount of droplets, and the filter is determined to be clogged.

[0082] When the humidity value detected by the humidity sensor is less than or equal to the set humidity value, it means that the amount of droplets passing through the filter is greater than the set amount of droplets, and it is determined that the filter is not clogged.

[0083] For example, the set ratio is 50%. When the humidity sensor detects a humidity value less than or equal to the set humidity value when the humidity level exceeds 50%, the filter is considered clogged. When the humidity sensor detects a humidity value less than or equal to the set humidity value when the humidity level does not exceed 50%, the filter is considered not clogged.

[0084] For example, six humidity sensors are installed on the leeward side of the filter. When the humidity value detected by three or more humidity sensors is less than or equal to the set humidity value, it is determined that the filter is clogged.

[0085] In some embodiments of this application, multiple humidity sensors are arranged in a matrix, which can further improve the accuracy of humidity detection on the leeward side of the filter, thereby improving the accuracy of filter clogging judgment.

[0086] In some embodiments of this application, multiple humidity sensors are directly mounted on the filter screen, which is simple and convenient, and can directly detect the humidity value on the leeward side of the filter screen.

[0087] In some embodiments of this application, the detection module 40 further includes a fixed frame 41, and a plurality of humidity sensors 42 are installed inside the fixed frame 41. The fixed frame 41 is detachably connected to the frame 31 of the filter.

[0088] Multiple humidity sensors 42 are arranged in a matrix and fixed inside the frame 41.

[0089] When the fixed frame 41 is installed on the frame 31 of the filter, multiple humidity sensors are located on the leeward side of the filter.

[0090] When one of the humidity sensors needs to be repaired or replaced, remove the retaining frame 41 from the filter frame 31 and then perform the repair or replacement.

[0091] By designing a fixed frame 41, which is detachably connected to the filter frame 31, the humidity sensor can be easily installed, removed, repaired, or replaced.

[0092] In some embodiments of this application, in order to improve the uniformity of the atomized droplets sprayed onto the filter screen, multiple spray modules 20 are provided, and the multiple spray modules 20 are arranged in an array, see [link to relevant documentation]. Figure 1 As shown.

[0093] For example, multiple injection modules 20 are arranged in a row at equal intervals.

[0094] In some embodiments of this application, the filter 30 is installed at the return air vent of the indoor unit of the air conditioner; the detection module 40 is installed on the leeward side of the filter 30; and the spray module 20 is installed on the back of the panel 10 of the indoor unit of the air conditioner, with the spray module 20 facing the windward side of the filter 30, which facilitates the installation and fixing of the spray module 20.

[0095] The air conditioning filter clogging detection device in this embodiment detects the amount of atomized liquid droplets passing through the filter, i.e., the amount of droplets sprayed onto the humidity sensor, to determine the cleanliness of the filter and then remind the user when to remove and clean the filter. The humidity sensor on the leeward side of the filter detects the humidity value, automatically determining whether the filter is clogged. Therefore, the cleanliness of the filter can be assessed without manually opening the panel to observe it.

[0096] Example 2

[0097] Based on the design of the air conditioner filter clogging detection device in Embodiment 1, this Embodiment 2 proposes a method for detecting air conditioner filter clogging.

[0098] The air conditioning filter clogging detection method in this embodiment mainly includes the following steps, see below. Figure 3 As shown.

[0099] Step S11: Spray atomized droplets onto the windward side of the filter.

[0100] Step S12: Determine whether the filter is clogged based on the amount of liquid droplets passing through it, and issue a prompt when the filter is clogged.

[0101] A spray module is used to spray atomized droplets onto the windward side of the filter. A detection module detects the amount of droplets passing through the filter and sends the detected amount to the control module. The control module determines whether the filter is clogged based on the amount of droplets passing through it and issues a warning when cloggedness is detected.

[0102] The air conditioning filter clogging detection method of this embodiment sprays atomized liquid droplets onto the windward side of the filter. The amount of liquid droplets passing through the filter determines whether the filter is clogged. When clogging is detected, a prompt is issued to remind the user to clean the filter in time. Therefore, the air conditioning filter clogging detection method of this embodiment, which determines whether the filter is clogged by the amount of liquid droplets passing through the filter, is simple, convenient, and has high detection accuracy, solving the technical problem of poor detection accuracy of filter clogging in the prior art.

[0103] In some embodiments of this application, determining whether the filter screen is clogged based on the amount of droplets passing through it involves the following steps, see below. Figure 4 As shown.

[0104] Step S21: Detect the humidity value using a humidity sensor located on the leeward side of the filter.

[0105] Step S22: Determine whether the filter is dirty or clogged based on the humidity value detected by the humidity sensor.

[0106] When the humidity value detected by the humidity sensor is less than or equal to the set humidity value, it indicates that the amount of droplets passing through the filter screen is less than or equal to the set amount of droplets, and the filter screen is determined to be clogged.

[0107] When the humidity value detected by the humidity sensor is greater than the set humidity value, it means that the amount of droplets passing through the filter is greater than the set amount of droplets, and it is determined that the filter is not clogged.

[0108] By designing S21 to S22, the system determines whether the filter is clogged based on the humidity value detected by the humidity sensor. This method is simple, convenient, and highly accurate.

[0109] In some embodiments of this application, the determination of whether the filter screen is clogged is based on the amount of liquid droplets passing through the filter screen, specifically including the following steps, see [link to relevant documentation]. Figure 5 As shown.

[0110] Step S31: Use multiple humidity sensors located on the leeward side of the filter to detect humidity values.

[0111] Step S32: Determine whether there are humidity sensors that detect humidity values ​​less than or equal to the set humidity value, exceeding the set ratio.

[0112] If so, that is, if more than a set proportion of humidity sensors detect humidity values ​​less than or equal to the set humidity value, then proceed to step S33: determine that the filter is clogged.

[0113] If not, that is, if no humidity sensor detects a humidity value less than or equal to the set humidity value, then proceed to step S34: determine that the filter is not clogged.

[0114] Therefore, when the number of humidity sensors that detect humidity values ​​less than or equal to the set humidity value exceeds the set ratio multiplied by the total number, it is determined that the filter is clogged.

[0115] If the number of humidity sensors that detect a humidity value less than or equal to the set humidity value does not exceed the set ratio multiplied by the total number, it is determined that the filter is not clogged.

[0116] For example, the set ratio is 50%, and the total number of humidity sensors is 6. When three or more humidity sensors detect humidity values ​​that are less than or equal to the set humidity value, the filter is determined to be clogged.

[0117] By designing S31 to S34, the accuracy of humidity detection on the leeward side of the filter screen is further improved, thereby improving the accuracy of filter screen clogging judgment.

[0118] The following describes the specific steps of the air conditioning filter clogging detection method of this application through a specific embodiment. (See attached document.) Figure 6 As shown.

[0119] The air conditioner is running.

[0120] Enable the detection function.

[0121] The liquid droplets are sprayed onto the filter screen, and the droplets penetrate the filter screen and adhere to the humidity sensor behind it.

[0122] When the humidity sensor detects a humidity value that is less than or equal to the set humidity value, it will emit a warning sound to remind you to remove and clean the filter.

[0123] The detection process repeats. If the humidity value detected by the humidity sensor is still less than or equal to the set humidity value, an alarm will continue to sound to remind the user to clean the filter. This continues until the humidity value detected by the humidity sensor is greater than the set humidity value.

[0124] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An air conditioner filter screen dirty clogging detection device, characterized by: Comprising: a spraying module for spraying atomized liquid droplets to the windward side of the filter screen; a detection module for detecting the amount of liquid droplets passing through the filter screen; a control module for determining whether the filter screen is clogged according to the amount of liquid droplets detected by the detection module, and issuing a prompt when it is determined that the filter screen is clogged; the detection module comprises a humidity sensor arranged on the leeward side of the filter screen, and the amount of liquid droplets passing through the filter screen is detected by detecting the humidity value of the humidity sensor; the determination of whether the filter screen is clogged according to the amount of liquid droplets detected by the detection module comprises determining whether the filter screen is clogged according to the humidity value detected by the humidity sensor: when the humidity value detected by the humidity sensor is less than or equal to a set humidity value, it is determined that the filter screen is clogged; when the humidity value detected by the humidity sensor is greater than the set humidity value, it is determined that the filter screen is not clogged.

2. The filter screen clogging detection device of the air conditioner according to claim 1, wherein: the detection module comprises a plurality of humidity sensors arranged on the leeward side of the filter screen, and the amount of liquid droplets passing through the filter screen is detected by detecting the humidity value of each of the plurality of humidity sensors; the determination of whether the filter screen is clogged according to the amount of liquid droplets detected by the detection module comprises determining whether the filter screen is clogged according to the humidity value detected by each of the plurality of humidity sensors: when the humidity value detected by more than a set proportion of the humidity sensors is less than or equal to a set humidity value, it is determined that the filter screen is clogged; when the humidity value detected by less than a set proportion of the humidity sensors is less than or equal to a set humidity value, it is determined that the filter screen is not clogged.

3. The filter screen clogging detection device of the air conditioner according to claim 2, wherein: the plurality of humidity sensors are arranged in a matrix.

4. The filter screen clogging detection device of the air conditioner according to claim 3, wherein: the plurality of humidity sensors are directly mounted on the filter screen; or the detection module further comprises a fixed frame, and the plurality of humidity sensors are mounted in the fixed frame, and the fixed frame is detachably connected to the frame of the filter screen.

5. The air cleaner screen clogging detection device of claim 1, wherein: a plurality of spraying modules are arranged, and the plurality of spraying modules are arranged in an array.

6. The filter screen clogging detection device of the air conditioner according to any one of claims 1 to 5, wherein: the filter screen is mounted at the return air inlet of the indoor unit of the air conditioner; the detection module is mounted on the leeward side of the filter screen; the spraying module is mounted on the back of the panel of the indoor unit of the air conditioner, and faces the windward side of the filter screen.

7. A method for detecting dirt and clogging in an air conditioning filter, characterized in that: Comprising: spraying atomized liquid droplets to the windward side of the filter screen; determining whether the filter screen is clogged according to the amount of liquid droplets passing through the filter screen, and issuing a prompt when it is determined that the filter screen is clogged; the determination of whether the filter screen is clogged according to the amount of liquid droplets passing through the filter screen comprises: detecting the humidity value by using a humidity sensor arranged on the leeward side of the filter screen; determining whether the filter screen is clogged according to the humidity value detected by the humidity sensor: when the humidity value detected by the humidity sensor is less than or equal to a set humidity value, it is determined that the filter screen is clogged; when the humidity value detected by the humidity sensor is greater than the set humidity value, it is determined that the filter screen is not clogged.

8. The method of claim 7, wherein the method further comprises: determining whether the air conditioning filter is dirty based on the comparison result. the determination of whether the filter screen is clogged according to the amount of liquid droplets passing through the filter screen comprises: detecting the humidity value by using a plurality of humidity sensors arranged on the leeward side of the filter screen; determining whether the humidity value detected by the humidity sensor exceeding the set proportion is less than or equal to the set humidity value; if yes, determining that the filter screen is dirty and clogged; if no, determining that the filter screen is not dirty and clogged.

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